export enum Gender {
  male = '男',
  female = '女',
}

interface IResultIdCardNum {
  pass: boolean
  message?: string
  gender?: Gender
  nativePlace?: string
  birthday?: Date
  age?: number
}

interface IResolveDate {
  pass: boolean
  year?: string
  month?: string
  day?: string
  birthday?: Date
}

const validateIdent = {
  aIdentityCode_nativePlace: {
    // 城市代码列表
    11: '北京',
    12: '天津',
    13: '河北',
    14: '山西',
    15: '内蒙古',
    21: '辽宁',
    22: '吉林',
    23: '黑龙江',
    31: '上海',
    32: '江苏',
    33: '浙江',
    34: '安徽',
    35: '福建',
    36: '江西',
    37: '山东',
    41: '河南',
    42: '湖北',
    43: '湖南',
    44: '广东',
    45: '广西',
    46: '海南',
    50: '重庆',
    51: '四川',
    52: '贵州',
    53: '云南',
    54: '西藏 ',
    61: '陕西',
    62: '甘肃',
    63: '青海',
    64: '宁夏',
    65: '新疆',
    71: '台湾',
    81: '香港',
    82: '澳门',
    91: '国外',
  },

  /**  通过正则检查身份证号码是否符合规范，包括长度，类型，15位或者18位
   *
   * @param card 身份证号码
   * @returns boolean
   */
  IdentityCode_isCardNo(card: string) {
    //检查号码是否符合规范，包括长度，类型
    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
    const reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/
    if (reg.test(card) === false) {
      return false
    }
    return true
  },

  /** 通过身份证号码前两位校验地址城市
   *
   * @param card 身份证号码
   * @returns boolean
   */
  IdentityCode_checkProvince(card: string) {
    //取身份证前两位，校验省份
    const province = card.substring(0, 2)
    if (validateIdent.aIdentityCode_nativePlace[province] == undefined) {
      return false
    }
    return true
  },

  /** 通过身份证号码解析出生日及相关信息
   *
   * @param card 身份证号码
   * @returns IResolveDate接口
   */
  IdentityCode_ResolveBirthday(card: string): IResolveDate {
    //检查生日是否正确，15位以'19'年份来进行补齐。
    const len = card.length
    //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
    if (len === 15) {
      const re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/
      const arr_data = card.match(re_fifteen) // 正则取号码内所含出年月日数据
      const year = arr_data[2]
      const month = arr_data[3]
      const day = arr_data[4]
      const birthday = new Date('19' + year + '/' + month + '/' + day)
      return { pass: true, year: '19' + year, month, day, birthday }
    }
    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    if (len === 18) {
      const re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/
      const arr_data = card.match(re_eighteen) // 正则取号码内所含出年月日数据
      const year = arr_data[2]
      const month = arr_data[3]
      const day = arr_data[4]
      const birthday = new Date(year + '/' + month + '/' + day)
      return { pass: true, year, month, day, birthday }
    }
    return { pass: false }
  },

  /** 通过生日验证
   *
   * @param resolveDate IResolveDate接口
   * @returns boolean
   */
  IdentityCode_verifyBirthday(resolveDate: IResolveDate) {
    //校验日期 ，15位以'19'年份来进行补齐。
    const { pass, year, month, day, birthday } = resolveDate
    if (!pass) return false
    const now = new Date()
    const now_year = now.getFullYear()
    //年月日是否合理
    if (
      birthday.getFullYear() === Number(year) &&
      birthday.getMonth() + 1 === Number(month) &&
      birthday.getDate() === Number(day)
    ) {
      //判断年份的范围（3岁到150岁之间)
      const time = now_year - Number(year)
      if (time >= 3 && time <= 150) {
        return true
      }
      return false
    }
    return false
  },

  /** 通过校验位验证18位身份证号码
   *
   * @param card 18位身份证号码
   * @returns boolen
   */
  IdentityCode_checkParity(card: string) {
    //校验位的检测
    card = validateIdent.IdentityCode_changeFivteenToEighteen(card) // 15位转18位
    const len = card.length
    if (len === 18) {
      const arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]

      const arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']

      let cardTemp = 0
      for (let i = 0; i < 17; i++) {
        cardTemp += parseInt(card.substring(i, i + 1)) * arrInt[i]
      }
      const valnum = arrCh[cardTemp % 11]
      if (valnum === card.substring(17, 18)) {
        return true
      }
      return false
    }
    return false
  },

  /** 将15为身份证号转换成18位
   *
   * @param card 15为身份证号
   * @returns 18位身份证号码
   */
  IdentityCode_changeFivteenToEighteen(card: string) {
    //15位转18位身份证号
    if (card.length === 15) {
      const arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]

      const arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']

      let cardTemp = 0
      let vcard = card.substring(0, 6) + '19' + card.substring(6)
      for (let i = 0; i < 17; i++) {
        cardTemp += parseInt(vcard.substring(i, i + 1)) * arrInt[i]
      }
      vcard += arrCh[cardTemp % 11]
      return vcard
    }
    return card
  },
}

export function IdentityCodeValid(card: string): IResultIdCardNum {
  let pass = true
  // let message = '';
  let gender = Gender.male
  if (pass && card === '') {
    pass = false
    return { pass, message: '身份证号码为空！' }
  }
  if (pass && validateIdent.IdentityCode_isCardNo(card) === false) {
    pass = false
    return {
      pass,
      message:
        '输入的身份证号长度不对，或者号码不符合规定！<br>18位号码末位可以为数字或X。',
    }
  }
  if (pass && validateIdent.IdentityCode_checkProvince(card) === false) {
    pass = false
    return { pass, message: '身份证号码前两位不正确！' }
  }
  //校验生日
  if (
    pass &&
    validateIdent.IdentityCode_verifyBirthday(
      validateIdent.IdentityCode_ResolveBirthday(card),
    ) === false
  ) {
    pass = false
    return { pass, message: '身份证号码中年龄不正确！' }
  }
  //检验位的检测
  if (pass && validateIdent.IdentityCode_checkParity(card) === false) {
    pass = false
    return { pass, message: '身份证号码中校验位不正确！' }
  }
  if (pass) {
    const icard = validateIdent.IdentityCode_changeFivteenToEighteen(card)
    if (parseInt(icard.charAt(16)) % 2 == 0) {
      gender = Gender.female
    } else {
      gender = Gender.male
    }
    const { year, birthday } = validateIdent.IdentityCode_ResolveBirthday(card)
    const now = new Date()
    const now_year = now.getFullYear()
    const age = now_year - parseInt(year) + 1
    const province = card.substring(0, 2)
    const nativePlace = validateIdent.aIdentityCode_nativePlace[province]
    return { pass, gender, birthday, age, nativePlace, message: '验证通过！' }
  }
}
